Population dynamics of snail inter mediate hosts of fasciola gigantica in Behera Governorate

ABSTRACT

It was noted that Lymnaea caillaudi and L. cailaudi var. Alex and rina were only species of Lymnaea snails which were present on Behaira Governorate. The reproduction and propagation of these snails began at the end of summer and beginning of autumn [September and October]. A sharp increase in the number occurred and reached a peak during December through February [the rainy season]. L. caillaudi snails were mainly found at the margins of the drainage channels, small irrigation channels, wide irrigation channels and the margin of the River Nile. The snail population increased when the pH of water ranged between 7.0 to 8.5 and no snails were present at pH 9.0